Fix the page title.
Fix the footer link to github.
Add a tooltip in the small multiple.
Merge branch 'develop'

* develop:
  Add a tooltip in the small multiple.
  Fix the footer link to github.
  Fix the page title.
Merge branch 'master' into gh-pages

* master:
  Add a tooltip in the small multiple.
  Fix the footer link to github.
  Fix the page title.